Frank (Andrew Lancel) is arrested for the vicious attack that left her bruised and bloodied - but Carla cannot come to terms with her horrific ordeal.
When close pal Peter Barlow (Chris Gascoyne) visits her, teary Carla declares her love for him and begs him to leave his wife Leanne again.
But he knocks her back - completing her humiliation and sparking the overdose.
A source said: "Carla is at rock bottom. She prides herself on being invincible and feels utterly broken by Frank's actions.
"Peter is the only friend she has left and she's never felt rejection like it. She wants to end it all."
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